200936774 六、發明說明： 【發明所屬之技術領域】 本發明係關於製造高爐主原料的燒結礦時所使用的原 料，特別係經成形（造粒）的燒結礦製造用原料之製造方法。 【先前技術】 近年’受中國鋼鐵生產量增加的影響，對鐵礦的需求正於 全世界延伸。日本國内各家鋼鐵公司約6〇mass%的鐵礦主要 ❹係從澳洲進口。但是，在澳洲，對燒結礦製造而言屬較佳高 品質之赤鐵礦即將枯竭，因而，最近便以含有大量針鐵礦的 馬萊曼巴（Marra Mamba)礦石、豆褐鐵礦、或者含有大量碟 的赤鐵礦等為出貨主力。 鐵礦的供應處係除澳洲之外，尚有如巴西、印度等的礦 坑，但關於印度，原則上，Fe含有量達60mass%以上的鐵礦 係其國内優先使用，並限制輸出。因而，若由世界整體觀之， © Fe達60mass%以上的高品質鐵礦明顯地有不足傾向。此意味 著目前強烈期望開發出目前尚未被利用之低品質鐵礦的有 效活用技術。 習知有數個關於此種將低品質鐵礦使用為煉鐵用原料，特 別係燒結礦製造用原料的技術。 專利文獻1中提案有：在含鐵粉礦的煉鐵用原料中，除副 原料的石灰石之外，並將由平均粒徑1 y in以上且未滿 15"m、比表面積3000cm2/g以上且950〇cm2/g以下的碳酸鈣 097145073 3 200936774 (CaCOOm^^ ^% #] s ^ ^ #〇> 〇5mass% 以上且5mass%以下，並進行造粒。 再者專利文獻2中揭示有將由含有5〇mass%以上之 以下粒子料_切石等減質材料所構成的微鐵粉鑛 用結塊劑’且提案有湘由該結塊劑與水硬性物質的混合 物，施仃冷固（cold b〇nd)而進行的鐵礦顆粒之製造法。 ❹ 再者，專利文獻3中提案有：包括有將煉鐵用原料與煤塵 一起進行造粒處理之步驟的煉鐵用原料之造粒方法。此造粒 方法的特徵在於：對煤塵，添加以重量平均分子量 1000〜5000000之高分子化合物為必要成分的煤塵處理劑， 並進行混合後，再將該混合物添加於煉鐵用原料中，並施行 造粒處理。 再者，專利文獻4中揭示有：在鐵礦等之中調配入生石灰， 並添加水且施行1次造粒之後，再添加黏度5〜l〇〇mPa· s ©的液狀黏結劑並施行造粒的方法。所獲得之造粒粒子於燒結 機内的加熱乾燥並無問題’且亦無因燒成過程中的崩解或微 粉釋出而造成通氣性降低的問題’屬於提高燒結礦生產性的 技術。 而且，在專利文獻5中揭示有相關含有鐵礦及鈣離子發生 源的燒結原料之造粒用黏結劑，亦即，含有膨潤土與重碳酸 鹽及/或碳酸鹽的燒結原料之造粒用黏結劑。根據此黏結 劑’藉由在膨潤土中併用重碳酸鹽及/或碳酸鹽’可防止因 097145073 4 200936774 鈣離子導致膨潤土凝膠化，且藉由調整黏結劑中的重碳駿鹽 及/或碳酸鹽，而可控制隨該鈣離子與膨潤土的反應所伴= 之凝膠化而造成的黏性增加顯現時間，屬於可獲得造粒致果 良好且準粒子化性優異之造粒粒子的技術。 專利文獻1 ··日本專利特開2Q()5_89825號公報 專利文獻2:曰本專利特開平3_183729號公報 專利文獻3:曰本專利特開2⑽4_7613〇號公報 ® 專利文獻4 .日本專利特開2007-113086號公報 專利文獻5 .曰本專利特開2〇〇7—113〇88號公報 如上述，習知雖㈣粒徑較細的低品質鐵礦粉使用為燒社 礦製造用原料的技術，但是關於該等技術尚殘留如下述待解 決的問題9 即，專利文獻1所記载的方法，因為大量使用_以上 且未滿15口的石反酸部，因而必需將破酸妈施行微粉碎，不 ❹僅成本提冋’且從知行粉碎的場所至燒結工廠間的輸送及儲 礦較為困難’並伴隨有實用化困難的問題。 專利文獻2所5己載的方法中，除了將發生無機質材料粉的 粒度調整與處置問題之外，當使用水泥系物 質時，對燒結# 的製造而言屬不需要的_、八12〇3等爐渣成分變多，將降 低K礦的Fe成分’且有燒結確的爐渣含有量增加的問 題此外水泥系黏結劑的硬化耗時，且亦有需要養生設備 與長時間養生處理的問題。 097145073 200936774 再者，專利文獻3、4的技術因為屬於使用高價位有機黏 結劑的方法，因而耗費製造成本，且亦需要有機物的輸送費 用、儲存、添加的設備’而有製品成本提高的問題。 而’關於專利文獻5所記載的方法，因為使用含有Si〇2、 Al2〇3的膨潤土 ’因而導致爐渣產生量增加，且當使用或 K作為碳酸鹽時，於燒結擴成分方面尚殘留有問題。 【發明内容】 ❹ 本發明之目的在於：第1 ’有效利用粒徑較細的低品質鐵 礦；第2，解決微鐵粉礦使用時的處置問題；第3，有利於 爐〉查生成量較少、高品質且成本廉價之燒結礦製造用原料的 製造。 為了達成上述目的’本發明提供具有以下步驟的燒結礦製 造用原料之製造方法。 —種燒結礦製造用原料之製造方法，係包括有： ©準備燒結用原料粉、與平均粒徑以下之鐵礦超微粉 的準備步驟； 相對於上述燒結用原料粉，將上述鐵礦超微粉依 2〜15maSS%添加量進行添加•混合，而形減微粉被覆燒結 原料粒子的添加•混合步驟；以及 將上述超射禮錢結補奸施減_成形步驟。 上述燒、‘用原料粉係含有燒結原料用鐵礦粉與返礦 ㈣的—製造用之燒結原料。 097145073 6 200936774 上述燒結原料用鐵镇粉較㈣ 5mass%以下的幻〇2、刃c 55mass%以上的Fe、 55〜69贴沾％的以、〇 5 贴沾心乂下的Al2〇3。更佳係含有 U. 5吒贴沾％的Si〇2、 负 上述鐵礦超微粉係依選· ~5咖_ Al2〇3 上述_超_相對上:)錢得的尾確。 5儀域。上述量’較佳係 施行測定。 彻濕式雷射法 © 依照濕式雷射法施行的測金 , ，係光照射粒子時的散射光朝 B 利用粒徑越大，相對地前方變強，隨粒徑變小 而相較於前方散射，側邊散射、後方散射的比例增加的情 形除檢Λ出則方散射以外，尚檢測出侧邊散射、後方散射， 而測定微小粒子的方法。 上述鐵礦超微粉較佳係含有60mass%以上的Fe、 0. 5 5mass/^的 Si〇2、及 〇. 5~5mass%的 Al2〇3，而在成形時具 ©有成形助劑的功能。特佳係含有6〇〜7〇mass%的Fe、 0. 5〜5mass%的 Si〇2、及 〇. 5〜5mass°/。的 Al2〇3。 上述鐵礦超微粉較佳為南美產赤鐵礦的尾礦。上述南美產 赤鐵礦較佳為卡拉哈斯（Carajas)鐵礦。 上述鐵礦超微粉較佳為非洲產赤鐵礦的尾礦。 另外’燒結用原料粉係除了燒結原料用鐵礦粉之外，尚含 有依燒結礦製得、且無法利用作為高爐裝入原料或燒結機鋪 底礦（floor laid mineral)之5mm以下的較細返礦，其相對 097145073 7 200936774 於燒結用原料粉通常含有15〜30mass%。且，亦有在燒結用 原料粉中，含有平均粒徑5顏以下的煉鐵廠贼再生原料粉 3~5mass%之情況。 再者’將上述燒結祕用__由平均純1545_ 的粗粒鐵礦、與平均粒徑小於粗粒鐵礦之範圍内的細粒鐵礦 所構成。 以下，將除了燒結原料用鐵礦粉之外，尚將返礦、及煉鐵 ❹廠回收再生原料粉的燒結用原料，使用作為燒結用原料粉的 情況進行以下說明。 上述添加·混合步驟較佳係在燒結用原料粉中，將上述鐵 礦超Μ籾依2〜15mass%添加量進行添加•混合，而形成超微 粉被覆燒結原料粒子。 上述成形步驟較佳係如下： (A) 將燒結用原料粉與鐵礦超微粉利用混合機進行混合、 ❿調濕後’再使用轉鼓式造粒機（drum pelletizer)形成超微 粉被覆燒結原料粒子。 (B) 將燒結用原料粉與鐵礦超微粉利用混合機施行混合、 調濕後’再使用圓盤式造粒機形成超微粉被覆燒結原料粒 子。 上述成形步驟較佳係添加副原料、黏結劑、水及分散劑之 任1種以上，並形成超微粉被覆燒結原料粒子。 上述副原料係使用於燒結礦的爐渣成分調整，較佳為從石 097145073 200936774 灰石、白雲石、生石龙、々 Λ 夕石、蛇紋岩、Ni爐渣、菱鎂礦 及砂鐵所構成之群組中至少選擇丨種。 在上述成$步驟中所添加的水，較佳係配合成形助劑的添 加量，依成形後粒子的乾燥前水分量以上之方式 添加。更佳為6〜lOmass%。 相關上述刀政劑’較佳係由含敌酸基、續酸基之官能基的 有機化口物所構成的界面活性劑，相對於微細粉^合礦石添 〇加G.GG2〜G.G()5mass%。上述界面活性劑較佳係從萘續酸 納、硬脂酸鋼、烧基硫酸鉀所構成之群組中至少選擇！種。 根據上述本發明的燒結礦製造用原料之製造方法，將習知 在礦坑等處未被利用而置棄的尾礦等鐵礦超微粉，有效地利 用為鐵資源之一，同時可有效利用作為成形助劑（即黏結 劑），此情形可有助於廉價燒結礦的製造。 再者’根據本發明’除了可抑制導致爐潰成分增加的黏結 ©劑使用1: ’且成形（造粒處理）亦可輕易地實施。 再者’根據本發明’較為困難的尾礦處置變得容易，且可 輕易地將礦坑所產生的尾礦搬運至煉鐵廠。 再者，根據本發明，針對困擾著煉鐵廠的高品質鐵礦枯竭 之不可避免可提供有效_決手段，且對產品的成本 降低、燒結礦生產量增佳均有貢獻。 【實施方式】 在鐵礦的礦坑通常係將從礦山所採集的含脈石鐵礦施行 097145073 200936774 破碎，再利用分粒處理首先選礦分離出礦石塊並回收。接 著，再將經選礦分離的筛下物之礦石粉更進一步利用濕式分 粒處理分離出燒結用粉礦石並回收。另一方面，關於該屬於 經濕式分粒處理後篩下物的微粉，係流入於增稠器中，而沉 澱的微粉則回收並利用作為燒結用鐵粉礦。另一方面，從該 增稠器中取出的殘渣，亦即利用增稠器中的沉澱處理仍無法 捕集到之屬於超微粉的礦石，係取出作為尾礦（尾砂）。所取 φ 出的殘渣係相對於屬於有用礦石的精礦而被稱為「尾礦」。 所取出的尾礦一般因為均混雜於增稠器排水中，因而將礦山 附近的池塘、沼澤等處當作堆積場並儲礦。該尾礦的鐵成分 稍少於精礦，另一方面，成為爐渣成分的Si〇2、Al2〇3係 1. 5〜5. Omass%，相對地較精礦少。而且，因為尾礦的平均直 徑（表示算術平均直徑，以下亦同）係10# m以下的較小值， 因而在作為燒結礦製造用成形原料方面，目前為止均被視為 〇 不適當的礦石。所以，雖亦被稱「儲礦」，但現實上卻等同 於未被利用而直接置棄的狀況。此儲礦量雖依礦山而異，但 仍有達數億噸的情況。 此種尾礦係例如在巴西礦山的情況，雖稱其為「選礦殘 渣」，但由Fe含有達60mass%以上的觀點而言，仍屬於可成 為有用鐵資源物。將該尾礦未利用而直接置棄的情形，於資 源有效活用方面上亦不較佳，而有開發有效活用方法的價 值。 097145073 10 200936774 因此，發明者等針對屬於鐵礦超微粉的選礦殘潰（即尾礦） 的有效活用進行各種探討。結果發現，尾礦不僅可利用為資 源，且可利用其源自屬於超微粉的特性。即’發現其可利用 作為在將燒結原料粒子施行成形（以下亦稱「造粒」）時的黏 結劑（成形助劑）。而在將上述尾礦活用作為成形步驟中所使 用之成形助劑的著眼，係依以下論述之技術背景而達成。 一般，燒結礦係除了鐵粉礦及返擴之外’尚將副原料、黏 〇結劑、其他的原料及焦碳粉進行混合，添加水’利用轉鼓式 造粒機、圓盤式造粒機等進行成形（造粒）而作成燒結礦製造 用成形原料後，將該成形原料在燒結機上依成為 500mm〜700mm層厚的方式裝入，在燒結機上的原料層表面著 火之同時’藉由從該原料層下方的吸引，使原料層中的焦碳 粉燃燒’藉由該燃燒熱便製得經成塊化的燒結礦。 ❹ 此種在燒結礦的製造步驟中所使用之屬於上述燒結礦製 造用成形原料的燒結用原料粉，在將其進行造粒時，習知為 使用生石灰（CaO)等作為在使燒結用原料粉的粗粒粒子與細 粒粒子進行造粒之際用於使之結合的黏結劑生石灰（C & 〇) 等。該生石灰若與水產生反應，便生成Ca(0H)2的細微粒子， 藉由4 Ca(GH)’細微粒子在造粒時侵人於鐵粉礦的各粒子 間間隙中絲著，㈣有將鐵子彼此結合並形成牢固之 準粒子的侧。但，因為該生石灰容易吸濕且與水產生反應 時進行放熱’因而在操作上必需特別注意，且有若添加量超 097145073 200936774 過2. Omass%則效果飽和的問題。特別係該生石灰並不含有BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raw material used for producing a sintered ore of a main raw material of a blast furnace, and more particularly to a method for producing a raw material for sinter production by forming (granulation). [Prior Art] In recent years, the demand for iron ore has been extended worldwide due to the increase in China's steel production. About 6 〇 mass% of iron ore in various steel companies in Japan are mainly imported from Australia. However, in Australia, hematite, which is a better quality for the production of sinter, is about to be depleted. Therefore, Marra Mamba ore, bean limonite, or a large amount of goethite has recently been used. Hematite, which contains a large number of discs, is the mainstay of shipment. The supply of iron ore is in addition to Australia, there are pits such as Brazil and India, but in India, in principle, iron ore with an Fe content of more than 60 mass% is domestically preferred and limits output. Therefore, if viewed from the whole world, high-quality iron ore with a Fe content of 60 mass% or more is obviously insufficient. This means that there is a strong desire to develop effective and effective technologies for low-quality iron ore that have not yet been utilized. There are several techniques for using such low-quality iron ore as raw materials for iron making, particularly raw materials for sinter production. Patent Document 1 proposes that, in addition to the limestone of the auxiliary raw material, the raw material for iron making containing iron ore fines has an average particle diameter of 1 y in or more and less than 15 " m and a specific surface area of 3000 cm 2 /g or more. 950 〇cm2/g or less of calcium carbonate 097145073 3 200936774 (CaCOOm^^^% #] s ^ ^ #〇> 〇5mass% or more and 5mass% or less, and granulation. Further Patent Document 2 discloses that An agglomerating agent for micro iron powder ore consisting of less than 5 〇 mass% of the following particulate material _ cut stone or the like; and a mixture of the agglomerating agent and the hydraulic substance is proposed, and cold is applied (cold)制造 制造 ) ) 铁 铁 铁 铁 铁 铁 铁 铁 铁 铁 铁 铁 铁 铁 铁 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造 造The granulation method is characterized in that a coal dust treatment agent containing a polymer compound having a weight average molecular weight of 1,000 to 5,000,000 as an essential component is added to the coal dust, and after mixing, the mixture is added to the raw material for iron making, and Perform granulation treatment. Furthermore, patent In the fourth, it is disclosed that: in the iron ore, etc., the quicklime is added, and water is added and granulation is performed once, and then the liquid binder having a viscosity of 5 to l〇〇mPa·s © is added and granulation is performed. The obtained granulated particles have no problem in heating and drying in the sintering machine, and there is no problem that the air permeability is lowered due to disintegration during the firing or release of the fine powder, which is a technique for improving the productivity of the sinter. Patent Document 5 discloses a granulation binder for a sintering raw material containing iron ore and a calcium ion generating source, that is, a granulating binder containing a sintered raw material of bentonite and bicarbonate and/or carbonate. According to the binder, by using bicarbonate and/or carbonate in bentonite, it is possible to prevent the gelation of bentonite by calcium ions from 097145073 4 200936774, and by adjusting the heavy carbon salt in the binder and/or Carbonate, which can control the increase in viscosity due to the gelation of the reaction between the calcium ion and the bentonite, and is a technique for obtaining granulated particles having good granulation results and excellent quasi-particulate properties. . [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. Japanese Laid-Open Patent Publication No. Hei 2-7-113-88. As described above, it is known that (4) a low-quality iron ore fine powder having a fine particle diameter is used as a raw material for manufacturing a ceramics ore. However, as for the above-mentioned problems to be solved in the above-mentioned techniques, the method described in Patent Document 1 has a large amount of a stone acid-removing portion of _ or more and less than 15 ports, and therefore it is necessary to implement the method of breaking the acid. The smashing is not only a cost increase, but it is difficult to transport and store the mine from the location where the knowing and smashing is to the sinter plant, and it is accompanied by the problem of practical use. In the method described in Patent Document 2, in addition to the problem of particle size adjustment and disposal of the inorganic material powder, when the cement-based material is used, it is not necessary for the manufacture of the sintered #_, 八12〇3 When the slag composition is increased, the Fe component of the K ore is lowered, and the content of the sintered slag is increased. In addition, the curing of the cement-based binder is time-consuming, and there is also a problem that the health equipment and the long-term health treatment are required. 097145073 200936774 Furthermore, the techniques of Patent Documents 3 and 4 are a method of using a high-priced organic binder, which requires a manufacturing cost, and also requires an apparatus for transporting, storing, and adding organic matter, and has a problem of an increase in product cost. On the other hand, in the method described in Patent Document 5, since the bentonite containing Si〇2 and Al2〇3 is used, the amount of slag generated is increased, and when K or K is used as the carbonate, there is still a problem in the sintering expansion component. . SUMMARY OF THE INVENTION The object of the present invention is to: [1] effectively use low-quality iron ore with fine particle size; second, to solve the problem of disposal when using micro-iron ore; and third, to facilitate furnace production. The manufacture of raw materials for the production of sintered ore, which is less, high quality and inexpensive. In order to achieve the above object, the present invention provides a method for producing a raw material for sinter ore production having the following steps. A method for producing a raw material for producing a sintered ore, comprising: preparing a raw material powder for sintering, and preparing a fine iron ore fine powder having an average particle diameter or less; and preparing the iron ore ultrafine powder with respect to the raw material powder for sintering Adding and mixing according to the addition amount of 2 to 15 maSS%, and adding and mixing steps of the fine powder-coated sintered raw material particles; and the above-mentioned super-shooting and vouchers. The above-mentioned raw material powder contains a sintered raw material for the production of iron ore fines for sintering raw materials and returning ore (4). 097145073 6 200936774 The iron powder of the above-mentioned sintered raw material is more than (4) 5 mass% or less of illusion 2, the edge of the blade c 55 mass% or more of Fe, 55 to 69, and the 〇 5 paste of Al2〇3 under the heart. More preferably, it contains U. 5 吒 沾 % of Si 〇 2, negative The above iron ore ultrafine powder is selected · ~ 5 _ _ Al2 〇 3 The above _ super _ relatively:) The end of the money is indeed. 5 instrument domain. The above amount ' is preferably measured. Wet-type laser method © According to the wet-type laser method, the scattered light when irradiated with light is directed toward B. The larger the particle size, the stronger the front side, and the smaller the particle size. In the case where the ratio of the front side scattering and the side side scattering and the back side scattering increases, in addition to the square scattering, the side scattering and the back scattering are detected, and the method of measuring the fine particles is detected. The above iron ore ultrafine powder preferably contains 60 mass% or more of Fe, 0.5 5 mass/cm of Si 2 , and 5 to 5 mass % of Al 2 ,3, and has a function of forming aids during molding. . The special series contains 6〇~7〇mass% of Fe, 0.5~5mass% of Si〇2, and 〇. 5~5mass°/. Al2〇3. The above iron ore ultrafine powder is preferably a tailings of hematite produced in South America. The above-mentioned South American hematite is preferably a Carajas iron ore. The above iron ore ultrafine powder is preferably a tailings of hematite produced in Africa. In addition, the raw material powder for sintering is prepared in addition to iron ore fines for sintering raw materials, and cannot be used as a fine material of 5 mm or less as a blast furnace charging raw material or a floor laid mineral. Mine, its relative 097145073 7 200936774 raw material powder for sintering usually contains 15~30mass%. Further, there is a case where the raw material powder for sintering contains 3 to 5 mass% of the raw material powder of the iron shovel having an average particle diameter of 5 or less. Further, the above-mentioned sintering secret __ is composed of coarse-grained iron ore having an average purity of 1545 Å and fine-grained iron ore having an average particle diameter smaller than that of coarse iron ore. In the following, in addition to the iron ore fines for the raw material for sintering, the raw material for sintering, which is used for the recovery of the raw material powder and the raw material powder for the production of the raw material, is described below. The above-mentioned addition and mixing step is preferably carried out by adding and mixing the above-mentioned iron ore super-ruthenium in an amount of 2 to 15 mass% in the raw material powder for sintering to form ultrafine powder-coated sintered raw material particles. The above-mentioned forming step is preferably as follows: (A) mixing the raw material powder for sintering and the fine powder of iron ore with a mixer, and then adjusting the humidity, and then using the drum pelletizer to form an ultrafine powder-coated sintered raw material. particle. (B) The raw material powder for sintering and the fine powder of iron ore are mixed and conditioned by a mixer, and then the ultrafine powder-coated sintered raw material particles are formed by using a disk granulator. In the above-mentioned forming step, it is preferred to add at least one of an auxiliary material, a binder, water, and a dispersing agent to form an ultrafine powder-coated sintered raw material particle. The above-mentioned auxiliary raw material is used for adjusting the slag composition of the sintered ore, and is preferably a group consisting of stone 097145073 200936774 gray stone, dolomite, raw stone dragon, 夕 石 stone, serpentine rock, Ni slag, magnesite and sand iron. Select at least one of the groups. The water added in the above-mentioned step is preferably added in such a manner that the amount of the forming aid is added in accordance with the amount of water before drying of the particles after forming. More preferably 6~lOmass%. The above-mentioned knife agent is preferably a surfactant composed of an organic mouth-containing compound containing a functional group of a diacid group or a reductive acid group, and G.GG2 to GG() is added to the fine powder ore. 5mass%. Preferably, the above surfactant is selected from the group consisting of sodium naphthenate, stearic acid steel, and potassium sulphate; Kind. According to the method for producing a raw material for sinter production according to the present invention, an ultrafine iron ore powder such as tailings which is disposed of in a pit or the like and which is not used and used, is effectively utilized as one of iron resources and can be effectively utilized as A forming aid (ie, a binder), which can contribute to the manufacture of inexpensive sinter. Further, according to the present invention, in addition to suppressing the increase in the composition of the blasting agent, the agent can be easily applied by using 1: ’ and forming (granulation treatment). Further, according to the present invention, the more difficult tailings disposal becomes easy, and the tailings produced by the pit can be easily transported to the ironworks. Further, according to the present invention, it is possible to provide an effective means for the inevitable high-quality iron ore depletion which plagues the ironworks, and contributes to a reduction in the cost of the product and an increase in the amount of sinter production. [Embodiment] In the mine of iron ore, the gangue-bearing iron ore collected from the mine is usually crushed by 097145073 200936774, and then the ore is first separated by ore separation and recovered. Then, the ore powder of the sieved material separated by the ore separation is further separated by the wet type separation to separate the fine ore for sintering and recovered. On the other hand, the fine powder belonging to the sieved material after the wet-separation treatment flows into the thickener, and the precipitated fine powder is recovered and utilized as iron ore fine for sintering. On the other hand, the residue taken out from the thickener, i.e., the ore which is still incapable of being captured by the precipitation treatment in the thickener, is taken out as a tailings (tailing sand). The residue obtained by φ is called "tailing" relative to the concentrate belonging to the useful ore. The tailings taken out are generally mixed in the thickener drainage, so the ponds, swamps, etc. near the mine are treated as a dumping site and stored. The iron content of the tailings is slightly less than that of the concentrate. On the other hand, the Si 〇 2 and Al 2 〇 3 systems which are slag components are 1. 5 to 5. Omass% is relatively less than the concentrate. In addition, since the average diameter of the tailings (indicating the arithmetic mean diameter, the same applies hereinafter) is a small value of 10# m or less, it is regarded as an inappropriate ore as a forming raw material for sinter production. . Therefore, although it is also called "storage", it is actually equivalent to being abandoned without being used. Although this deposit varies from mine to mine, it still has hundreds of millions of tons. Such a tailings system is, for example, a "mineralized residue" in the case of a Brazilian mine, but it is still a useful iron resource from the viewpoint that Fe contains 60 mass% or more. The case where the tailings are not disposed of and used directly is not preferable in terms of effective resource utilization, and there is a value for developing an effective utilization method. 097145073 10 200936774 Therefore, the inventors conducted various discussions on the effective utilization of the ore dressing (ie, tailings) belonging to the ultrafine powder of iron ore. As a result, it was found that the tailings can be utilized not only as a resource but also from the characteristics belonging to the ultrafine powder. In other words, it has been found to be useful as a binder (forming aid) when the sintered raw material particles are molded (hereinafter also referred to as "granulation"). The use of the above-mentioned tailings as a forming aid used in the forming step is achieved by the technical background discussed below. In general, in addition to iron ore and re-expansion, the sinter system combines auxiliary materials, binders, other raw materials and coke powder, and adds water to use a drum granulator or disc. After the pelletizing machine or the like is formed (granulated) to form a molding material for sinter production, the molding material is placed on the sintering machine so as to have a layer thickness of 500 mm to 700 mm, and the surface of the raw material layer on the sintering machine is ignited. 'The coke powder in the raw material layer is burned by suction from below the raw material layer'. By the heat of combustion, agglomerated sintered ore is produced. In the case of granulating the raw material powder for sintering which is a raw material for the production of the sinter ore which is used in the production of the sinter, it is conventional to use quicklime (CaO) or the like as a raw material for sintering. When the coarse particles of the powder and the fine particles are granulated, the binder quicklime (C & 〇) is used for bonding. If the quicklime reacts with water, it forms fine particles of Ca(0H)2, which are infiltrated in the gap between the particles of the iron ore fine during granulation by the 4 Ca(GH)' fine particles. (4) The irons are bonded to each other and form the sides of the solid quasiparticles. However, since the quicklime is easily hygroscopic and exothermic when reacting with water, it is necessary to pay special attention to the operation, and there is a problem that the effect is saturated if the amount of addition is 097145073 200936774 over 2. Omass%. Especially the quicklime does not contain
Fe成分，僅不過含有爐渣成分而已。所以，生石灰的使用 並無法成為鐵資源。 相對於此，使用作為成形助劑的上述尾礦，係即使在使用 作為將燒結礦製造用原料進行成形（造粒）時之黏結劑的情 況，仍可提供一定量之Fe源，並可不致增加爐渣而使用， 故由此等觀點而言亦較有利。但是，因為該尾礦係呈超微粉 ❹狀，因而必需解決處置的問題。關於該處置的問題，在本發 明中，係儘可能地在礦坑中，藉由預先摻合於燒結用粗粒鐵 礦及較其更細的細粒鐵礦中，而可將屬於超微粉的尾礦之單 獨處置保留於必要最小極限，因而屬較佳。藉由追加此種處 理，則其成為燒結原料之一，亦可承受長距離輸送。 在如上述的思考方式下可獲得本發明。本發明的燒結礦製 造用原料之製造方法，包括有：準備燒結用原料粉與平均粒 ©徑10/zm以下之鐵礦超微粉的準備步驟；相對於上述燒結用 原料粉，將上述鐵礦超微粉依2〜i5mass%添加量進行添加· 混合，並形成超微粉被覆燒結原料粒子的添加•混合步驟； 以及將上述超微粉被覆燒結原料粒子施行成形的成形步驟。 上述燒結用原料粉係含有燒結原料用鐵礦粉與返礦的燒 結礦製造用之燒結原料。 上述燒結用鐵礦粉較佳係含有：55mass%以上的Fe、 5mass%以下的Si〇2、以及5mass%以下的Ah〇3。更佳係含有： 097145073 12 200936774 55〜69廳成的Fe、0. 5〜5贴沾％的別2、以The Fe component contains only the slag component. Therefore, the use of quicklime does not become an iron resource. On the other hand, the use of the above-mentioned tailings as a forming aid can provide a certain amount of Fe source even when a binder is used as a raw material for sinter production (granulation). It is also advantageous from the viewpoint of adding slag and using it. However, since the tailings system is in the form of ultrafine powder, it is necessary to solve the problem of disposal. Regarding the problem of the treatment, in the present invention, as far as possible in the pit, by pre-blending into the coarse iron ore for sintering and the finer fine iron ore, it is possible to belong to the ultrafine powder. The separate disposal of the tailings is retained at the minimum necessary limit and is therefore preferred. By adding such a treatment, it becomes one of the sintering raw materials and can also withstand long-distance transportation. The present invention can be obtained in the manner of thinking as described above. The method for producing a raw material for sinter production according to the present invention includes: a preparation step of preparing a raw material powder for sintering and an iron ore ultrafine powder having an average particle diameter of 10/zm or less; and the iron ore having the above-mentioned raw material powder for sintering The ultrafine powder is added and mixed in an amount of 2 to i5 mass%, and an addition/mixing step of forming the ultrafine powder-coated sintered raw material particles; and a molding step of molding the ultrafine powder-coated sintered raw material particles. The raw material powder for sintering contains a sintered raw material for the production of sintered ore from iron ore fines for sintering raw materials and returned ore. The iron ore fine for sintering preferably contains: 55 mass% or more of Fe, 5 mass% or less of Si 2 , and 5 mass% or less of Ah 3 . The better system contains: 097145073 12 200936774 55~69 Hall into the Fe, 0. 5~5 paste the % of the 2, to
Al2〇3〇 u.5~5maSS% 的 上述鐵礦超微粉較佳係含有：6〇贴 0· 5〜5mass%的 Si〇2、以；5 n c c η/ 的 Fe、 6〇~69mass%的 Fe、o.5〜5m. h〇3。更佳係含有： 祕。 55__^、qQ.5〜5mass_ 以下’針對此製造仏進行詳細說明。 上述尾礦中，本發明所著㈣ = '非洲，的尾礦。例如代表南美產赤鐵礦的巴 西卡拉哈韻狀⑽較㈣奸 品質（Fe成分）雖猶低，伯w驟㈣頌 近年來過‘心相較於 口口質 中的澳洲產鐵礦等，其品質屬於絕對不 差的水準。此外，_產赤鐵侧 f屬於絕對不 ❹ 成分雖為54_%，卜藉二乂：巴鐵礦)的尾礦’ Fe 可較簡單地提升品質了二比重選礦， 水合日交且盤取儿α 不買上具有容易吸附 =: 性質，且因為附著性較高，因而長距離 '争難’且作為燒結礦製造用成形原料用的粒度過細， ，右在未處理之下Μ使用，則有燒結生產性明顯惡化的 問題。 斤、發歧等為針對此尾礦探尋為能賴於本發明製造 方法的條件，針對其基礎物性與造粒性進行調查。 097145073 13 200936774 表1所示係巴西1鐵礦、巴西卡拉哈斯鐵鑛（燒結原料、 尾礦）、澳_邱〜c)及非洲麵鐵叙非洲昆巴礦石等的 化學成分。為了作為參考，亦合併記載膨潤土的化學成分。 此外’圖1(a)表㈣等礦石·度分佈比較。圖丨⑻表示 巴西卡拉哈斯鐵礦（尾礦）的微粒部位之粒度分佈。圖咖 之粒度分佈係依照濕式雷射法所測得。由表丨得知， ❹ 為燒結原料的巴西礦石相較於澳洲礦石，屬於^卩陆使用作 的礦石。此情況係藉由與圖2(a)〜（c)所示質且緻密 (SEM)的澳洲礦石相比較，可知巴西鐵礦⑷:顯微鏡照片 粒子表面錄呈平滑’且屬於造㈣較的情沉中， [表1] 水分的性狀。 (―:極微量） ❹ 097145073 巴西I礦石 _(燒結原料） 巴西、卡拉哈斯碟石 (燒結原料） 巴西、卡拉哈斯確石 («) 澳洲A破石 (燒結原料） 澳洲石 %結原料） 澳洲Cit石 @結原料） 非洲昆巴礦石尾碟 _昆巴礦石^s 膨潤土The above-mentioned iron ore ultrafine powder of Al2〇3〇u.5~5maSS% preferably contains: 6〇0·5~5mass% of Si〇2, 5; 5 ncc η/ of Fe, 6〇~69mass% Fe, o. 5~5m. h〇3. Better system contains: Secret. 55__^, qQ.5~5mass_ The following is described in detail for this manufacturing 仏. In the above tailings, the invention (4) = 'Africa, tailings. For example, the Brazilian Karaha rhythm (10) representing the South American hematite is lower than the (four) rape quality (Fe composition), and the Bo (4) 颂 has passed the 'heart' in comparison with the Australian iron ore in the mouth. Its quality is absolutely not bad. In addition, the _ production of the red iron side f is absolutely not ❹ The composition is 54_%, the borrowing of the second 乂: Batie mine) tailings 'Fe can simply improve the quality of the two specific gravity beneficiation, hydration and cross-cutting α does not have the property of easy adsorption =: nature, and because of the high adhesion, the long-range 'competition' and the particle size used as a forming raw material for sinter production are too fine, and the right is used under untreated, and there is sintering. The problem of marked deterioration in productivity. The jin, the ambiguity, and the like are investigated for the tailings to be based on the conditions of the manufacturing method of the present invention, and the basic physical properties and granulation properties are investigated. 097145073 13 200936774 Table 1 shows the chemical composition of Brazil 1 iron mine, Brazil Karahas iron ore (sintering raw materials, tailings), Australia _ Qiu ~ c) and African iron and steel Africa Kumba ore. For reference, the chemical composition of bentonite is also described. In addition, the ore-degree distributions of Table 1(a) and Table 4 are compared. Figure (8) shows the particle size distribution of the particle fraction of the Karahas iron ore (tailings) in Brazil. The particle size distribution of the graph is measured according to the wet laser method. It is known from the table that the Brazilian ore that is the raw material for sintering is the ore used for the land compared to the Australian ore. In this case, by comparison with the quality and compact (SEM) Australian ore shown in Figures 2(a) to (c), it can be seen that the Brazilian iron ore (4): the surface of the microscopic photo particles is smooth and belongs to the creation (four). Shen Zhong, [Table 1] Water traits. (―: very small amount) 097 097145073 Brazil I ore _ (sintering raw material) Brazil, Kalahas slate (sintering raw material) Brazil, Kalahas stone («) Australia A broken stone (sintering raw material) Australian stone% knot raw material ) Australia Cit Stone @结原料) Africa Kumba Ore Tail_Kumba Ore ^s Bentonite
200936774 Ο200936774 Ο
Q 另方面’本發明中具成形助劑功能的巴西卡拉哈斯鐵擴 之在發明者等人的調查令’從圖！之粒度分佈及圖3 ^微鏡照片中亦可得知，屬於粒度非常小、表面具許 奸財之_賴粉。顿看狀較大者係 早為凝綠子的部分。具有此縣面性狀的超微 鮮化之鐵礦，呈分散於將燒結用原料粉（即粗粒•細粒 =與返魏行造粒而準粒化時所添加的水中之狀態，如 不’其附著於成為核粒子丨的粗粒鐵礦、與較核粒子 儿立且成為微粒子2的細粒_之表面上，並侵入於微 粒鐵礦與細粒鐵礦U者依覆蓋該等的方式進行附著， =有提升整體填充率的作用。且，即使在造粒時的水分消 ^树絲高的粒子’崎其可達麟原料粒子間 賦予一疋附著強度的黏結劑（成形助劑）作用。 再：’當所使用的返礦亦施行造粒而準粒子化的情 边‘刀成為核粒子1，細粒部分成為微粒子2，尾 核粒科與細粒部分石之間，或者更進—步 =入至 式附著，而具有提升整體填充率的作用。覆-該等的方 徑另:::：== 曰圖1(b)所不，利用濕式雷射法進行測定。 但是，習知使用作為黏結劑的生石灰疋 有較多的爐_成成分，因㈣了使料受㈣等，因為含 本與供應方面亦構成問題。再者 礦=外，於成 一 錯礦方面亦有問 15 200936774 題。相對於此，在具有相同作㈣上述尾狀情況，可供應 量的限制較少，最大特徵係在發揮黏結劑作用之同時，亦可 成為鐵源，制是由Fe含有達6Qmass%以上的觀點而言， 可認為係習知所忽略之處，不僅有關於資源的有效活用且 具有亦有關於高品質礦使用量之節約的優點。另外，當上述 尾礦的Fe絲未滿6Gmas辦，本發⑽比重選鑛法 等’而可使用Fe達6Qmass%以上者。其理由在於，使用作Q In another aspect, the Brazilian Karahas Iron with the function of the forming aid in the present invention is expanded by the inventor and others. The particle size distribution and Fig. 3 can also be seen in the micromirror photograph, which belongs to the particle size is very small, and the surface has a lot of money. The larger one is the part of the greening. The ultra-fine fresh iron ore having the characteristics of the county surface is dispersed in the state of the raw material powder for sintering (that is, the coarse-grained-fine-grain========================================== Adhered to the surface of the fine-grained iron ore which is a core particle, and the fine particle which becomes the fine particle 2, and infiltrates into the fine iron ore and the fine iron ore U, it covers it. Adhesion, = has the effect of improving the overall filling rate. Moreover, even in the case of granulation, the particles having a high moisture content of the saplings can be used as a binder (forming aid) which imparts an adhesive strength between the granules of the granules. Then: 'When the used returning mine is also used for granulation and quasi-particles, the knife becomes the nuclear particle 1, the fine particle part becomes the microparticle 2, the caudate nucleus and the fine grain part of the stone, or more - Step = in-line attachment, and has the effect of increasing the overall filling rate. Cover - the square of the other::::== 曰 Figure 1 (b) does not, using the wet laser method for measurement. It is customary to use the raw lime as a binder to have more furnaces, because (4) the material is subject to (4) Wait, because the content of the package and the supply also poses a problem. In addition to the mine = outside, Yu Chengyi also has questions about the problem of 200936774. In contrast, in the case of the same tail (4), the supply can be limited. Less, the biggest feature is the role of the binder, but also can be used as an iron source. The system is considered to be neglected by the fact that Fe contains up to 6Qmass% or more, and is not only effective in terms of resources. It has the advantage of saving about the use of high-quality ore. In addition, when the Fe wire of the tailings is less than 6Gmas, the hair (10) specific gravity beneficiation method, etc., can use Fe up to 6Qmass% or more. The reason is that it is used
為燒結用原料的燒結用原·子係含有55〜69顏％的Fe， 右使用較燒結用原料粒子更低品f的尾礦，則導雜結用原 料鐵礦本身的品質降低。所以，燒結用原料鐵礦的Fe成分 必需為超過55mass%的含有量，本發明中，藉由將尾礦的Fe 设定在60mass%以上，則可達成提升經成形（造粒）之準粒子 的強度。 因為上述尾礦係平均直徑1〇#m以下的超微粉，因而本發 ❹明中，最好使用儘可能在礦坑中，將其預先與燒結原料（粗 粒•細粒鐵礦）進行混合’而形成摻合粉者^藉由形成此種 形態’則例如長距離的輸送亦變得容易，即使如日本般的遙 遠國度仍可符合經濟性地使用》 但是’該尾礦係如上述般’因為屬於選礦時依增稠器沉澱 殘查形式回收的10// m以下之超微粉礦石，因而粒徑較細， 當使用超過15mass%(相對於燒結原料，内容數）時，過剩的 部分並無法發揮附著於燒結原料粒子表面上的黏結劑作 097145073 16 200936774 用，而是本身自行㈣單獨的微粒子（輪朴若此種尾罐 的準粒子比例過多，當裝人至燒結機台車並形成原料層（鱗 層）時，則成為阻礙通氣性的原因。所以，本發明中，該尾 礦對燒結原料粒子（準粒子）的添加量’較佳係設定為 2祕％以上且15mass%以下（内容數），若考慮到該尾擴的輪 送，則可謂5〜l〇mass%左右的添加屬最佳。此種尾礦的容積 比重亦為生石灰的2〜3倍，通常在燒結步驟中，因為使用 ❹_以上之生石灰作為造粒黏結劑，因而容積比重較大的 尾礦必需至少添加2mass%以上。 另外，含有尾礦並經準粒子化的超微粉被覆燒結原料粒 子，若重複施行此種處置，在過財超細微尾礦本身發生凝 聚並準粒子化，恐有無法利_結劑作㈣可能性。所以， 本發明中，在成形（造粒）時，藉由除了調濕用的水之外，亦 -起將具有促進粒子分散仙，且由含紐基、俩基之官 ❹能基的有機化合物所構成界面活性劑，例如萘細納^硬二 酸鈉、或烷基硫酸鉀等，相對於超微粉被覆燒結原料粒子添 加請2〜G.G()5mass%左右程度賴用，藉由使已凝聚的: 粒子先分散，對充分誘發出成形助劑的效果而言亦屬有效。 再者，在礦坑所處理之掺合粉中的尾礦，係除了所例示的 巴西礦石之外，在添加於南非洲產昆巴礦石的尾礦、其他礦 石中的情況時亦有效，且與黏結劑的併用亦有效。 但是，本發明中，添加上述尾礦的燒結原料粒子，係如圖 097145073 17 200936774 4所示，在成為核粒子i的平均粒徑15賴以上、較佳 1· 5〜4. 5mm的粗粒鐵礦表面上，附著平均粒徑較細於核粒子 1的微粒子2之細粒鐵礦而呈被覆狀態，而屬於平均粒徑 2〜10mm左右的準粒子。 本發明的燒結礦製造用（成形）原料，係指在經過成形過程 時，在經準粒子化的上述燒結原料粒子之表面，特別係由核 粒子1(粗粒鐵鑛）與微粒子2(細粒鐵礦）所構成的間隙中， ❹屬於上述尾礦的尾砂粒子3以分散於所添加之水分中的狀 態進入’並依埋藏該間隙之同時亦將表面附蓋的方式進行附 著之狀態的準粒子。該尾礦在成形時，係更加縮小核粒子1 與微粒子2的粒子間之空隙，發揮一邊進行分散，一邊自身 因根據較大比表面積的毛細管現象所產生的黏結劑作用，亦 即成形助劑的功能。即，本發明中，屬於上述尾礦的尾砂粒 子3成為將粗粒核粒子1、與較核粒子1更細粒之微粒子2 ©間的間隙埋藏之狀態的準粒子。此時，因為上述尾礦係使用 經採礦後被當作選礦殘渣而除去物，因此該準粒子更接近於 破碎前的採礦時之鐵礦塊。 所以，使用尾礦之事，係如同該尾礦成為鐵資源般，亦發 揮黏結劑作用，因而本發明的情況中，即便在成形之時，亦 不需要使用一般所用的生石灰、或如石灰石物等的結合劑。 當然，亦可併用該等一般結合劑。 另外，上述尾礦可有效作為黏結劑（結合劑）與成形助劑使 097145073 18 200936774 用’因而若水分含有量偏少，則削減該等作用效果，因而較 佳係使用5·%以上、更佳6随％以上的水分含有量物。 ^係為了使尾礦充分分散於水中，且必f—邊良好地填充於 成為核的粗粒子周圍所附著之細粒粒子間的間隙中，並一 邊進行移動，因而在成形時所必要的水分。若水分量不足 時，在成形階段最好配合尾礦的調配量進行添加。 [實施例1] ❹ =下述者各2· 5Kg進行造粒試驗：相對平均粒徑（算術 平均直徑，以下亦同）2.43_的作為燒結原料粒子（燒結用 粗粒鐵礦）之巴西卡拉哈斯鐵礦（以下簡稱「c _ l」）、與 同樣平均粒徑1匪以下的細粒鐵礦（以下簡稱「c鐵礦s厂 =該〇鐵礦的尾礦依内容數（inside⑽⑽計分別添二含 有〇maSs%(試驗Νο. Π、2随％(試驗N〇. 2)、4嶋热（試驗 ❹ N〇. 3)、5mass%(試驗 No· 4)、8mass°/。（試驗 No. 5)、1〇m _ 驗 No. 6)、12_%(試驗 Νο· 7)、15mass%(試驗(忒 181^33%(試驗此.9)而構成的燒結原料粒子 及 N V修·合鐵礦 二以及經添加生石灰2.0_%的摻合鐵礦(試驗 Ν〇· 1〇)。該造粒試驗係使用直徑400咖圓盤式造 — 入 壤· 4 丁混 合、造粒。此外，為了比較，在上述C鐵礦中 τ 添加習知佶 用作為造粒用黏結劑的生石灰2. 〇mass%，並實施相_ 粒試驗。採取造粒後的試料UOkg，利用縮分進行造 其中之一係馬上施行粒度分析並測定濕潤狀態的粗户=^ ’ 097145073 19 200936774 然後在大氣中冷卻，再 者則在11(TC下施行12小時乾燥 測定乾燥狀態的粒度分#。 關於試驗N。· 1~Nq· 1Q的測定結果，於表2、 ⑹中依濕潤狀態、乾燥狀態的平均粒徑表示。從該圖I中 得知，藉由使用2~15mass%之尾礦#作造粒用成形助劑（試 驗Να 2〜Μα 8)，可增加·狀態準粒子的平均祕（算術平 均直徑）。此外’可知相較於未添加該成獅劑的情況，經 添加該成形助劑的情況、特別係尾礦為5贴的％〜1〇贴沾％範 ❹In the raw material for sintering, the raw material for sintering contains 55 to 69% by weight of Fe, and the right side is used to lower the tail of the raw material particles for sintering, so that the quality of the raw material for iron ore is reduced. Therefore, the Fe component of the raw material iron ore for sintering must be more than 55 mass%. In the present invention, by setting the Fe of the tailings to 60 mass% or more, the quasi-particles for improving the forming (granulation) can be achieved. Strength of. Because the above-mentioned tailings are ultrafine powders with an average diameter of 1 〇#m or less, it is preferable to use the sinter raw materials (coarse fine-grained iron ore) in the pit as much as possible. However, by forming such a form, it is easy to transport, for example, over a long distance, even if it is a distant country like Japan, it can be used economically. However, 'the tailings are as above' Because it belongs to the ultra-fine powder ore of 10//m or less which is recovered according to the thickening sediment precipitation form during beneficiation, the particle size is fine. When using more than 15 mass% (relative to the sintering raw material, the number of contents), the excess is It is impossible to use the binder attached to the surface of the sintered raw material particles as 097145073 16 200936774, but it is itself (4) separate fine particles (the round particles of the tail can have too much proportion of quasi-particles, when loaded into the sintering machine trolley and form raw materials In the case of the layer (scale layer), it is a cause of hindering the air permeability. Therefore, in the present invention, the amount of the tailings added to the sintered raw material particles (quasi-particles) is preferably set to 2% or more and 15 mass. % or less (number of contents), if considering the rotation of the tail expansion, it is best to add about 5 to l 〇 mass%. The volume specific gravity of such tailings is also 2 to 3 times that of quicklime, usually In the sintering step, since the raw lime of ❹_ or more is used as the granulation binder, the tailings having a large specific gravity must be added at least 2 mass% or more. In addition, the ultrafine powder containing the tailings and quasiparticled is coated with the sintered raw material particles. If this treatment is repeated, the superfine micro-tailings itself will be agglomerated and quasi-particleized, and there is a possibility that the agent will not be able to make a (4) possibility. Therefore, in the present invention, in the case of forming (granulation), In addition to the water for conditioning, it also has a surfactant which promotes particle dispersion and consists of an organic compound containing a ketone group and a ruthenium group, such as naphthalene fine sodium succinate. Or, the potassium sulfate or the like is added to the ultrafine powder-coated sintered raw material particles in an amount of about 2 to GG () 5 mass%, and the aggregated particles are first dispersed to sufficiently induce the effect of the forming aid. It is also valid. The tailings in the blended powder treated by the pit are effective in addition to the illustrated Brazilian ore in the tailings and other ores of the Kumba ore produced in South Africa, and are used in combination with the binder. 5mm。 The average particle size of the core particle i is more than 15, preferably 1·5~4. 5mm, as shown in Figure 097145073 17 200936774 4 On the surface of the coarse-grained iron ore, a fine-grained iron ore having an average particle diameter smaller than that of the fine particles 2 of the core particle 1 is adhered to form a quasi-particle having an average particle diameter of about 2 to 10 mm. The (formed) raw material means a surface composed of the quasi-particles of the above-mentioned sintered raw material particles, particularly composed of nuclear particles 1 (coarse iron ore) and fine particles 2 (fine iron ore), during the forming process. In the gap, the tailings particles 3 belonging to the above-mentioned tailings enter the state in which they are dispersed in the added water, and adhere to the gap and also adhere the surface to the surface. When the tailings are formed, the gap between the particles of the core particles 1 and the fine particles 2 is further reduced, and the dispersion agent is dispersed while being self-contained by a capillary phenomenon according to a large specific surface area, that is, a forming aid. The function. In other words, in the present invention, the tailings particles 3 belonging to the above-mentioned tailings are quasi-particles in a state in which the gap between the coarse-grained core particles 1 and the finer particles 2 which are finer than the core particles 1 are buried. At this time, since the above-mentioned tailings system is used as a beneficiation residue after being removed by mining, the quasi-particles are closer to the iron ore nuggets at the time of mining before the crushing. Therefore, the use of tailings is such that the tailings become an iron resource and also function as a binder. Therefore, in the case of the present invention, it is not necessary to use the usual quicklime or limestone, even at the time of forming. Etc. Of course, these general binders can also be used in combination. In addition, the above-mentioned tailings can be effectively used as a binder (bonding agent) and a forming aid to make 097145073 18 200936774. Therefore, if the water content is too small, the effect is reduced. Therefore, it is preferable to use more than 5% or more. Jia 6 contains more than % of water. In order to sufficiently disperse the tailings in the water, the tailings are well filled in the gap between the fine particles adhering around the coarse particles which become the core, and are moved while being moved. . If the amount of water is insufficient, it is best to add it in the forming stage with the blending amount of tailings. [Example 1] ❹ = 5% of each of the following granulation tests: Baccarat as a raw material particle (sintered coarse iron ore) with a relative average particle diameter (arithmetic mean diameter, the same applies hereinafter) of 2.43_ Hass iron ore (hereinafter referred to as "c _ l"), and fine-grained iron ore with the same average particle size of 1 匪 or less (hereinafter referred to as "c iron ore s plant = tailings of the coltan ore according to the number of contents (inside (10) (10) Add two to contain 〇maSs% (test Νο. Π, 2 with % (test N〇. 2), 4 嶋 heat (test ❹ N〇. 3), 5mass% (test No. 4), 8mass ° / ( Test No. 5), 1〇m _ test No. 6), 12_% (test Νο· 7), 15 mass% (test (忒181^33% (test this. 9)) of sintered raw material particles and NV repair · Hematite II and blended iron ore (test Ν〇·1〇) with 2.0% of quicklime added. The granulation test was carried out using a diameter of 400 coffee discs - incorporation, 4 □ mixing, granulation. In addition, for comparison, in the above-mentioned C-iron ore, τ is added as a granule for the granulation, and the phase granule test is carried out. The granulated sample UOkg is used and the shrinkage is used. One of them was made by directly performing particle size analysis and measuring the wet state of the crude product = ^ ' 097145073 19 200936774 and then cooling in the atmosphere, and then drying at 11 (TC for 12 hours to determine the dry state of the particle size score #. Test N. The measurement results of 1~Nq·1Q are shown in Table 2 and (6) in terms of the wet state and the average particle size in the dry state. From Fig. 1, it is known that by using 2 to 15 mass% of tailings# As a forming aid for granulation (test Να 2 to Μα 8), the average secret (arithmetic mean diameter) of the quasi-particles in the state can be increased. Further, it can be seen that the forming is added as compared with the case where the lion-forming agent is not added. The situation of the auxiliary agent, especially the tailings of the tailings is 5% of the stickers~1〇 沾%%❹
圍的情況，乾燥後的粒徑較大，在原料層内呈乾燥時亦不易 崩解，且通氣性保持良好。此外，亦得知若尾礦的添加量超 過15mass%，即便在濕潤狀態下具有效果，但因為經乾燥時 則崩解，尾礦的微粉將增加，因而平均粒徑變小。 [表2] 試驗 No. 配合條件 濕潤狀態 平均直徑〖mm) 乾燥狀態 平均i徑（ΠΠΙ1) 1 C鐵礦 2. 7 2. 6 2 C鐵礦+C鐵礦尾礦 2. Omass% 3.3 3. 3 3 C碱礦+C鐵礦尾礦 4. Omass% 3.5 3.5 4 C鐵礦+C鐵礦尾礦 5. Omass% 4. 6 4. 0 5 C鐵礦+C鐵礦尾礦 8. Omass% 8.3 4. 5 6 C鐵礦+C鐵礦尾礦 10.Omass% 7.8 4. 2 7 C鐵礦+C鐵礦尾礦 12. Omass% 5.8 3. 8 8 t鐵礦+C鐵礦尾礦 15. Omass% 「4.0 Γ 3.8 9 C鐵礦+C鐵礦尾礦 18.Omass% 3.4 2.5 10 C鐵碱+生石灰 2. Omass% 3. 2 —-- 3. 7 *C鐵礦：巴西卡拉哈斯鐵礦 097145073 20 200936774 [實施例2] 為了調查造粒時的水分影響，將C鐵礦、及C鐵礦+c鐵 =的尾礦10. (hna域當作試料，並如同上料粒試驗實施使 &粒時的水分在5. Q〜1(). Q職沾範圍内進行變化的造粒試 驗，調查平均亩你Λ Γ~ . 一』且倥Umm的粒度。結果如圖6(濕潤粒子）、 圖7(乾燥粒子）所示。 由違等圖所示的結果得知，在濕潤狀態下，經混合尾礦的 ❹摻& ^7粒彳：、與僅單純為G鐵礦進行比較時並無太大差異， 但經乾燥後的粒徑，係當添加造粒水分6_%以上時呈現 出顯著的效果。即，確認到平均直徑增大，且-0.5腿以下 的微粒子比例大幅減少。但，得知屬於通常巴㈣石造粒水 分的5〜5· 6mas_ ’其效果減少。由此現象得知因為該 原料的造粒水分係5mass%的較少值，因而在尾礦增加時， 亦必需增加造粒水分的量，以，此時，難雜造粒水分 ©超過5. 5mass%，並配合尾礦的增加而再增加。其理由係鐵 礦超微粉的填純藉由水的存在錢到κ滑的效果，因而較 佳係使造粒水分達6mass%以上。 [實施例3] (試驗A) 在C鐵礦（3〇massW、與其他的普通燒結用粗鐵粉礦 (30.3mass%)中，添加副原料的石灰石（8. 2mass%)、白雲石 (7.3maSS%)、矽石（2.2masS%)、生石灰（2 〇mass%)、燒結返 097145073 21 200936774 礦（20. Omass%)、及焦碳粉（4. 35mass%，外容數）。將水分依 造粒後粒子的水分量計，調整在通常巴西礦石的 5· Omass% ’以及以巴西鐵礦、澳洲鐵礦為主體，且經摻合印 度、非洲產鐵礦的燒結用鐵礦所通常使用的7. Omass%之中 間值的6. Omass%，利用直徑1. Om鼓式攪拌機施行5分鐘造 粒後，於直徑300mm鍋試驗裝置中裝入成層厚為600mm，並 施行燒成試驗。 ❺(試驗B) 在與上述同量的C鐵礦、經添加該C鐵礦之尾礦lOmass% 的摻合礦石（30mass%)、以及其他的通常燒結用粗鐵粉礦粉 (30.5mass%)中，添加副原料的石灰石（8. 2mass%)、白雲石 (7. 3mass%)、矽石（2. Omass%)、生石灰（2. 〇mass%)、燒結返 礦（20. Omass%)、及焦碳粉（4. 35mass%，外容數），將水分依 造粒後粒子的水分量計’調整為7. 5mass%，利用直徑1. Om ❿鼓式攪拌機施行5分鐘造粒後，於直徑3〇〇mm鍋試驗裝置中 裝入成層厚為600mm，並施行燒成試驗。 (試驗C) 依照與上述B相同的配方，並將作為界面活性劑的萘磺酸 納’在造粒步驟中依外谷數计添加〇.〇〇2mass% ’亦實施經 造粒粒子的燒成實驗。 (試驗D) 在C鐵礦（25mass%)、與其他通常的燒結用粗鐵粉礦 097145073 22 200936774 (36«)中，調配人副原料的石灰石（η·%)、白雲 石a 3massW、發石（1· 5mass%)、生石灰（2. G廳s%)、燒結 返概20. 0廳s%)、及焦碳粉（4 35腿s%，外容數），水分係 如同通Μ又依6. Omass%實施造粒，然後利用上述鋼試驗裝 置實施燒成試驗。 (試驗E) 在由C鐵礦與C鐵礦之尾礦lOmass%構成的摻合礦石 ❹（25mass%)、以及其他通常燒結用粗鐵粉礦⑽⑽咖％)中， 調配入副原料的石灰石（8. 2ma域）、白雲石（7. 、石夕 石（1· 2mass%)、生石灰（2. 〇mass%)、燒結返礦⑽.〇刪价 及焦碳粉（4.35maSS%，外容數），使水分如同通常般為 6. 0祕％且並不施行調整而實施造粒後，再利用上述鋼試驗 裝置實施燒成試驗。 該等一連串的燒成試驗（A〜E)結果係如圖8所示。如該圖 © 8所示’得知當使用3Qmass%以上之c鐵礦進行燒結礦製造 時，經添加尾礦10mass%的超微粉被覆摻合粉（幻係可獲得 生產性咼、強度高者。此外，得知藉由少量添加界面活性劑 (試驗C)，可更加提高生產性改善效果。然而，得知即便^ 施相同的配方，但若未施行水分調整（試驗D、E)，則生產 性及燒結礦冷卻強度（碎裂指數SI)均較本發明適合'例（試 驗B、C)差。 ° 【圖式簡單說明】 097145073 23 200936774 ()^巴西鐵礦經乾燥後_分的粒度分佈之圖 ’’、、：鐵急依濕式雷射法所獲得之粒度分佈之圖。 2(b)A &、巴西卡拉哈斯_的電子賴鏡W⑽），圖 :)=鐵礦的電子顯微鏡照片 )圖 鐵礦的電子顯微鏡照片⑽）。 ）為輿洲 鐵礦尾碌的電子顯微鏡照細)。 圖4(a)為習知經準粒 ❹ 4⑻為本發明經準粒 ，結原料粒子的示意圖，圖 R ^ 匕之^結原料粒子的示意圖。 ;的Ha、依照造粒試驗進行的濕潤狀態之平均粒徑刿定 圖，圖5⑻為以造粒試驗騎的錢 = 徑測定結果的圖。 。心十均粒 的ma)，為造粒時的水分添加量、錢缝態之平均粒徑 '、’圖6(b)為造粒時的水分添加量、與濕潤狀態的 -〇.5mm之關係圖。 〇 ® 7U)為造㈣的水分添加量、與乾雜態之平均粒徑 的關係圖’圖7(b)為造粒時的水分添加量、與乾燥狀態的 —〇.5mm之關係圖。 圖8(a)為實施例3的鍋試驗之生產率的圖；圖8(b)為實 施例3的鍋試驗之冷軋強度的圖。 097145073 24In the case of the circumference, the particle size after drying is large, and it is not easily disintegrated when it is dried in the raw material layer, and the air permeability is kept good. Further, it is also known that if the amount of tailings added exceeds 15 mass%, even if it is effective in a wet state, since it is disintegrated upon drying, the fine powder of the tailings will increase, and the average particle diameter will become small. [Table 2] Test No. Coordination conditions Wet state average diameter 〖mm) Dry state average i diameter (ΠΠΙ1) 1 C iron ore 2. 7 2. 6 2 C iron ore + C iron ore tailings 2. Omass% 3.3 3 . 3 3 C alkali ore + C iron ore tailings 4. Omass% 3.5 3.5 4 C iron ore + C iron ore tailings 5. Omass% 4. 6 4. 0 5 C iron ore + C iron ore tailings 8. Omass% 8.3 4. 5 6 C iron ore + C iron ore tailings 10.Omass% 7.8 4. 2 7 C iron ore + C iron ore tailings 12. Omass% 5.8 3. 8 8 t iron ore + C iron ore Tailings 15. Omass% "4.0 Γ 3.8 9 C iron ore + C iron ore tailings 18.Omass% 3.4 2.5 10 C ferric alkali + quicklime 2. Omass% 3. 2 —-- 3. 7 *C iron ore: Kalahas Iron Ore, Brazil 097145073 20 200936774 [Example 2] In order to investigate the influence of moisture during granulation, C iron ore and C iron ore + c iron = tailings 10. (hna domain as a sample, and The granulation test was carried out to control the water content of the granules in the range of 5. Q~1(). The granulation test was carried out within the range of Q smear, and the average MU Λ . . . . 一 一 一 一 一 。 。 mm mm mm mm mm mm mm mm mm mm mm mm mm As shown in Fig. 6 (wetting particles) and Fig. 7 (dry particles), it is known from the results shown in the diagram that it is mixed under wet conditions. The strontium blending & ^ 7 granules of the tailings is not much different from that of the G iron ore alone, but the particle size after drying is significant when the granulated water is added more than 6_%. That is, it was confirmed that the average diameter was increased, and the proportion of fine particles of -0.5 or less was greatly reduced. However, it was found that the effect of 5 to 5 · 6 mas _ which belongs to the usual granulated water of the squarish stone was reduced. 5mass%, and the amount of granulated water is more than 5. 5mass%, and it is necessary to increase the amount of granulated water. In addition to the increase in tailings, the reason is that the filling of the ultrafine powder of iron ore is effective in the gamma slip by the presence of water, so that the granulated moisture is preferably more than 6 mass%. [Example 3] Test A) In the C iron ore (3〇massW, and other common coarse iron ore fines for sintering (30.3mass%), add limestone (8.2%%), dolomite (7.3maSS%), 矽Stone (2.2masS%), quicklime (2 〇mass%), sintered back 097145073 21 200936774 ore (20. Omass%), and coke powder ( 4. 35mass%, the number of foreigners). According to the moisture content of the particles after granulation, the water is adjusted to 5. Omass%' of the usual Brazilian ore and the iron ore for sintering, which is mainly composed of Brazilian iron ore and Australian iron ore and blended with iron ore produced in India and Africa. 6. Omass% of the intermediate value of 7. Omass% which is usually used, which is granulated by a diameter of 1.0 Om drum mixer for 5 minutes, and then placed in a 300 mm diameter pot test apparatus to a layer thickness of 600 mm and fired. test. ❺ (Test B) In the same amount of C iron ore, the blended ore (30 mass%) of the tailings added with the C iron ore, and other ordinary coarse iron powder ore for sintering (30.5 mass%) , adding limestone (8.2 mass%), dolomite (7.3 mass%), vermiculite (2. Omass%), quicklime (2. 〇mass%), and sintering back minerals (20. Omass%) , and coke powder (4. 35 mass%, external capacity), the water content of the particles after the granulation is adjusted to 7.5 mass%, using a diameter of 1. Om ❿ drum mixer for 5 minutes granulation Thereafter, a layer thickness of 600 mm was placed in a 3 mm diameter pot test apparatus, and a firing test was performed. (Test C) According to the same formulation as the above B, the sodium naphthalenesulfonate as a surfactant was added to the granulation particle in the granulation step by adding 〇.〇〇2mass% Into the experiment. (Experiment D) Limestone (η·%), dolomite a 3massW, hair of human raw materials in C iron ore (25 mass%) and other common coarse iron ore fines 097145073 22 200936774 (36«) for sintering Stone (1·5mass%), quicklime (2. G hall s%), sintered return to 20. 0 hall s%), and coke powder (4 35 legs s%, external capacity), water is like overnight Further, granulation was carried out in accordance with 6. Omass%, and then a firing test was carried out by using the above steel test apparatus. (Experiment E) Limestone blended with by-products in a blended ore (25 mass%) consisting of lOmass% of tailings of C iron ore and C iron ore, and other coarse iron ore fines (10) (10%) (8. 2ma domain), dolomite (7., Shi Xishi (1·2mass%), quicklime (2. 〇mass%), sinter return (10). 〇 〇 及 and coke powder (4.35 maSS%, outside After the granulation was carried out as usual, and the granulation was carried out as usual, and the granulation was carried out without using the above-mentioned steel test apparatus. The series of firing tests (A to E) were performed. It is shown in Figure 8. As shown in Figure 8, it is known that when using 3Qmass% or more of c-iron ore for sinter production, 10 mass% of ultrafine powder coated tailings is added to the blended powder. In addition, it was found that the productivity improvement effect was further improved by adding a small amount of a surfactant (test C). However, it was found that even if the same formulation was applied, if the moisture adjustment was not performed ( Tests D, E), productivity and sinter cooling strength (fragmentation index SI) are more suitable than the present invention 'example (test B C) Poor. ° [Simple description of the schema] 097145073 23 200936774 () ^Graph of the particle size distribution of the Brazilian iron ore after drying _ minutes, ':, the particle size distribution obtained by the iron emergency wet laser method 2(b)A &, Kalahsas of Brazil_Electronic mirror W(10)), Fig.:) = electron micrograph of iron ore) Electron micrograph of iron ore (10)). ) is the electron microscope of the iron ore tail of Weizhou.) Fig. 4(a) is a schematic view showing a conventional quasiparticle ❹4(8) of the present invention as a quasiparticle, a raw material particle, and a graph of R^ 结. Ha, the average particle size measurement chart of the wet state according to the granulation test, and Fig. 5 (8) are the results of the measurement of the money = diameter of the granulation test. . Ma), the average amount of water added during granulation, and the average particle size of the money-slit state, 'Fig. 6(b) is the amount of water added during granulation, and -5 mm of the wet state relation chart. 〇 ® 7U) is the relationship between the amount of water added to (4) and the average particle size of dry heterogeneity. Fig. 7(b) is a graph showing the relationship between the amount of water added during granulation and the dry state of 〇.5 mm. Fig. 8(a) is a graph showing the productivity of the pot test of Example 3, and Fig. 8(b) is a graph showing the cold rolling strength of the pot test of Example 3. 097145073 24